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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8980984772ffee6cb89d0cc7739190930fad5fb3a708f3edb387dd7c2fbbde54' 
  AND token = 'POrxB5K7x7t7BZpc0jiZNGzYy9KSFB12P2zvRiFQD2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}